Cesium carbonate → 3-(4-Chlorophenyl)-6,6-dimethyl-1-(pyridin-2-yl)-4,5,6,7-tetrahydroindol-4-one

HRID 1937634Notes

Reaction equation

HRID 1937634 reaction equation
Br[C:2]1[C:10]2[C:9](=[O:11])[CH2:8][C:7]([CH3:13])([CH3:12])[CH2:6][C:5]=2[N:4]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=2)[CH:3]=1.C([O-])([O-])=O.[Cs+].[Cs+].[Cl:26][C:27]1[CH:32]=[CH:31][C:30](B(O)O)=[CH:29][CH:28]=1>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:26][C:27]1[CH:32]=[CH:31][C:30]([C:2]2[C:10]3[C:9](=[O:11])[CH2:8][C:7]([CH3:13])([CH3:12])[CH2:6][C:5]=3[N:4]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][N:15]=3)[CH:3]=2)=[CH:29][CH:28]=1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 742994-Chlorophenylboronic acidHCID 224612763-Bromo-6,6-dimethyl-1-(pyridin-2-yl)-4,5,6,7-tetrahydroindol-4-one

Product 1

HCID 224612773-(4-Chlorophenyl)-6,6-dimethyl-1-(pyridin-2-yl)-4,5,6,7-tetrahydroindol-4-oneYield 11%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
100 °C

Procedure

A solution of 3-bromo-6,6-dimethyl-1-(pyridin-2-yl)-4,5,6,7-tetrahydroindol-4-one (50 mg, 0.16 mmol) and tetrakis(triphenylphosphine)palladium (15 mg, 0.01 mmol) in ethylene glycol dimethyl ether (2 mL) at 45° C. was degassed with nitrogen for 30 min. A degassed solution of Cs2CO3 (104 mg, 0.16 mmol) in water (1 mL) was added followed by 4-chlorophenylboronic acid (25 mg, 0. 16 mmol). The solution was heated at 100° C. for 18 h then filtered through celite. The filtrate was partitioned between DCM and water. The organic phase was separated, dried (MgSO4) and evaporated. The residue was purified by column chromatography, eluting with isohexane: EtOAc (3:1) to give the title compound (6 mg, 11%) as a colourless solid. 1H NMR (360 MHz, d6-DMSO) δ 1.05 (6H,s), 2.37 (2H,s), 3.01 (2H,s), 7.38 (2H,d, J=8.5 Hz), 7.46-7.50 (1H,m), 7.56 (1H,s), 7.68-7.74 (3H,m), 8.05-8.09 (1H,m), 8.59-8.63 (1H,m). MS (ES+) 351/353 (M+1).

Workup

  1. filtrationthen filtered through celite
  2. customThe filtrate was partitioned between DCM and water
  3. customThe organic phase was separated
  4. dry with materialdried (MgSO4)
  5. customevaporated
  6. customThe residue was purified by column chromatography
  7. washeluting with isohexane: EtOAc (3:1)

Sources & evidence

ORD record
ord-5767f14319474bc49cdfdec60c1f6575
Source dataset
uspto-grants-2002_05
Patent number
US06395766B1

Reaction notes

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